- You will add some color and excitement underneath your gym attire when wearing our POP jockstrap! The pouch is constructed of soft poly/rayon with a touch of lycra for a snug fit. Contrast trim and stitching for a defined silouhette. The multi-color signature waistband and straps are finely knitted for a soft and comfortable feel. 60% polyester 32% rayon 8% spandex rib. Made in USA.